Jack



April 16, 1'940. H. A. WHARTENBY` `ET AL 2,197,026

JACK

Filed Feb.` 27, 1939 .1 'inv Patentes Apr.; 1s, 'i940 UNITED STATI-:sf

PATENT orrlcs 'A .non

Harry Auen whmenby' and Lewis nemen f Philadelphia, Pa.

Application February 274, 1939, ySerial No. 258,6

`t claims. (C1. 2st-s6) knownA types of jacks now availablein his toollo kit, and when a tire becomes flat place the jack beneath the axle, or other part of the vehicle adjacent the tire, and raise the same from the ground so that a spare may be substituted or the tire repaired. Many times a ilat or other l5, damage occurs under conditions in 'which such use of the jack is highly inconvenient, but prior to the, advent of this invention there ha been no substitute for using the jack other than driv'- ing on the flat, and if the'damage tothe car is 20 of such a nature as to prevent riding on a damaged wheel there is nothing to do but use the jack at the inconvenient location.A

'I'he inconvenience of 4using the jack is substantially entirely attributable to the need for accurately positioning the same beneath a-proper part of the vehicle. Generally speaking the rear axle, or other appropriate points, are inaccessible,

and it'is highly annoying to properly positionthe provision of a jack which is designed to be` permanently secured 'to the chassis Lof a motor vehicle'at an appropriate point, and which jack is readily operable when its use is required to raise that particular part of the vehicle from the ground. f.

'I'he invention contemplates an arrangement wherein each motor vehicle will be equipped with 40 at least two of the jacks, one being located at `each side of the car adjacent to or beneath the rearaxle, as it is the rear part of the car which is generallyY more inaccessible to having the jack placed therebeneath. I Y The invention has in view, as a further objectlveVthe provision ofl a jack of the character above described which includes as a ground or roadl engaging part a wheel or roller element. Thus when a jack is operated to raise the par:- ticular part of the vehicle with which it is associated from the road, lthe wheel of the jack is rendered effective toA supplil the vehicle, and it is then possible todrive the car on the jack wheel to a. service station or other piace where the necu essary repairs may be conveniently carried out.

ymeans for holding the wheel, and which means In providing a jack of thev character above noted it becomes important that the operating parts of the jack be of such a nature that they may be readily operated from a convenient position. 5

Another important object, therefore. is the provision of a jack of the character above noted to which an operating member may be readily and detachably secured when occasion demands. With a pair of jacks anchored to a carin posix0 tions to accommodate both of the rear wheels when occasion demands it becomes necessary to provide for holding a rear wheel immovable after it has been lifted from the ground.,- otherwise the differential in the rear axle would cause the ig raised wheel to spin freely, and prevent any drive going to the other rear wheel.

Accordingly the invention has in view, as a further important object, the provision of a jack of the character above described which includes m means for holding a wheel. raised on the ground againstv rotation. L

A somewhat more specific object of the invention lies in the provision of a jack including is automatically brought into eiect as the wheel is raised from the road. p

Various other more detailed 'obiects and advantages of the invention will in part become apparent, and in part be hereinafter stated. as g@ the description of the invention proceeds.

The invention, therefore, comprises a jack including means. for permanently 'securing the same to the chassis of a motor vehicle adjacent tol or beneath a rear axle, a wheel adapted to engage the ground to support the vehicle in a i raised position, operating mechanism including a connection for detachably securing an operating member thereto, and means' for holding a rear wheel of the vehicle against rotation when in an upraised position. f l

This application is a continuation in part of the copending application of Harry A. Wharte'nby et' al., serial No. 221,1'1en1ed July 25, 193s, for Automobile jack, a lifting and rolling device." 45

For` a full and more complete understanding of' the invention reference may be had to the following description and accompanying drawing, wherein l Figure 1 is a side viewpartly in elevation( and w partly in section, showing a jack as mounted on a motor vehicle at the rear in accordance with the precepts of this invention, and

Figure 2 is a bottom view of the jack mecha- `nism per se in avcollapsed state. u

Referring now to the drawing. wherein like reference characters denote corresponding parts, a rear wheel of av motor vehicle is designatedW and is shown as mounted on the usual rear axle I0, the housing of which also houses th difierential in a :well known manner.

The wheel W is covered by a fender i2 in the usual manner,- and this fender is formed with an opening at I3 for a purpose to be later described.

The jack mechanism comprises a top anchoring bar I4 which is securely aflixedto the housing of the rear axle I on the under side thereof in any preferred manner. It may be secured to the rear axle housing by a mechanical anchoring device such as shown at I3.v Any securing means which will give the positive connection required will suilce. The top bar I4 preferably takes the: form of a channel member opening towards the bottom and providing side anges I6 that are connected together by the top I1,this top I1 being comparatively wide to adequately accommodate the various parts which are operably secured thereto. At the forward end, the side flanges ISL carry pivot pins I3 which extend beyond the flanges on each side. Pivotally secured to the extensions of the. pins I8 are side arms I3 that may be held. assembled on the pins I8 by the enlarged or riveted heads'20.

Each oi' the arms I8 is offset as shown at 2| to Aprovide a wider spacing of these bars away from the pivotal mounting at I3. Extending Pivotally secured vto each of the flanges I6 oi I the top bar I4 on the exterior side thereof is a toggle link 26, the pivotal connection of which is shown at 21 and which preferably takes the form of a pin having its heads spread as by riveting to maintain the assembly.v Pivotally connected -in a similar manner on the inner side of each of the oset parts 2i of the arms I9 as shown at 28 isanother toggle link 29. The ends of the toggle links 26 and 23 are formed with openings through which pass the pins which serve to complete the toggle. 'I'hus the links 23 are pivotally mounted at one end on the pins 21 and at the other on the pins 30, while the links 23 are pivotally mounted at one endon the pins 28 and at the other on the pins 30. Thus, there is a toggle mechanism provided at each side of the Jack.

The pins-30 project inwardly from the links 26 and carry between the links 26. as an integral part thereof, a swivel member 3|. 'I'his swivel member 3i carries a bore 32 that transverses the axes of the pins 33, the latter being maintained in alignment by the swivel 3i 'I'he swivel 3i also carries'an arm 33 which extends outwardly from one side and has dual functions as will be later pointed out.' l

The pins I3 extend inwardly of the flanges I6 and the inwardly projecting parts carry, 'as an integral part thereof, a second swivel member that is formed with a bore that is intended to be alignedwith the bore 32. This bore 35 is threaded. Extending outwardly from the memconnection at 44.

ber 34 and beneath the top part I1 is a lubricant retainer in the form of a tubular member 36. A screw stem 31 is threaded as shown at 3l and this threaded end is received in the threaded bore 35. "Ihis screw stem 31 extends through the tubular member 36 and the bore 32 from entirety by the reference character` 4I and is shown as comprising a plurality of links 42 connected by the exible couplings 43. At one end the flexible driving shaft 4I is connected to the coupling 33 and at the other carries one part of a detachable coupling which is positioned in the opening I3, this part being shown at 44.

` In thecondition of the mechanism illustrated in Figure 1, the jack wheels 24 are shown as supporting the wheel W in an upraised position oi the road bed. In this position, the arm 33 engages the wheel W toprevent rotation thereof. Thus, when power is transmitted, to the diierential in the rear axle Ili,the wheel W will not spin freely and power will be transmitted to the wheel at the other side of.the car. Thus, the

car'may be driven to a location where the tire may vbe changed' or, other repairs carried` out. When it is desired to render the jack member ineffective and ha've the car -supported by the wheelvW rather than the jack wheels, anappropriete wrench is applied. to the detachable i As the wrench is turned, rotative power is'transmitted through the flexible driving shaft 4I to the screw stem 31. gagement of the threads at' 38 with the threads of the bore 35 causes the stem'31 to move to the left, speaking with reference to the drawing, whereupon the pins 30 of the toggles are moved The enin a corresponding direction to collapse the arms,

I3 with respect to the flanges I6 of the top part I1. Thus, the jack wheels 24 are retracted and raised from vthe road bed.

A's the jack mechanism is intended to be per.- manently secured to the chassis of the vehicle and at all times available for use, it is important that the pins 30 never attain a position of dead center in which it would be impossible to operate the jack. The fact that the arm 33 extends above the oiIset part 2l of the arm'IS at one side causes the arm 33 to function as a stop that prevents theattainment of any "dead center."

It is important to note that as the pivot pins 30 aremovedrearwardly to collapse the jack,.the pins 30 carry with them the swivel member 3|. Thus, the arm 33 isalso moved out of engagement with the wheel W torelease the latter.

When occasion arises that it becomes necessary to jack the wheel W of! the ground, the

Awrench is applied at the connection 44- in the manner above described and rotated 'in the opposite direction from that in-which it is turned for the above described operation.- 'I'he pins 30 are thus moved inwardly, and through the links 26 and 29 the arms I3 are swung downwardly to cause the wheel 24 to engage the road bedv and raise the wheel W.

It is to be clearly understood that the jackof u and described, because various I `means for rigidly n thsaid arm with alor/,caei permanents annuario` .n

this invention may be vany part of theA chassis or vehicle which may suit the construction-of the particular car. By employing a flexible driving shaft as shown at 4I, the operating connection at which vthe wrench is applied' may always be conveniently located.

While a preferred speciilc embodiment of the invention is hereinblefore set forth/it 'is to be clearly understood that the invention vis not to be limited to the exact. constructionsillustrated modications of lthese details maybe provided in putting the invention into practice within appended claims.

We claim: y l. A jack for motor vehicles. comprising afbar,

aiiixing said bar tothe framework of a motor` vehicle adjacent to a rear wheel, an arm pivotally carried by said barfa wheel on the free end of saidfarm, a Y between said bar andy arm, means for operating said toggle link to move the arm with respect to the bar, means included as a partsof said lastk mentionedmeans for engaging the wheel of the motor vehicle as the arm is expanded with respect td the bar to cause the wheel to engage the ground.

2. In combination, a motor vehicle includingla framework and a rear wheel, and a jack permanently secured to said framework and having means adapted/to engage said rearwheel co-incident with operation of the jack.

3. In combination, a motor lvehicle including a framework and a rear wheel, a lack comprising a bar nxedly secured to said framework adjacent to said wheel, an arm pivotaily carried by the bar, a toggle linkassembly between said arm and bar andincluding a movable pivot point, means for moving said pivot` pointto expand or collapse l a respect to the bar, and means for preventin saidtole a dead center" posi 4. combination, a motor emcludins s 'the purview of the.

' channel bar having spaced flanges,

toggle vlink assembly link assembly from asframework anda rear wheel, a iackcomprising a `bar iixedly secured to said framework adjacent to said wheel, an arm vpivotally carried by the bar, a toggle link assembly betweenv said arm and bar and including a movable pivot point, means for moving said pivot pointto expand or collapse the said arm with respect to the bar, and a crosspiece carried by said movable pivot point for en gaging the wheel of the motor vehicle as an incident to expansion of the arm with respect to the l0 bar, said cross piece also preventing the pivot point from assuming a dead center Aposition upon collapse of the cross piece. y 5. A jack for -motor vehicles comprising a f means for selil curing said bar to the framework of a motor vehicle, a pair` of arms kspaced apart, each of said arms being pivoted to one of said side flanges, a pair of wheels carried at th'e free end of said arma a toggle link assembly connecting each of the flanges with the arm that is pivotaly mounted thereon. said toggle link assembly including mov` able pivot points, and mechanism associated with said last said means for moving said pivot points to expand .or collapse the arms with respect to the bar. f

.6. In combination, a motor vehicle including a framework, a rear wheel and a fender covering thel said wheel, a jack xedly secured to said lframework adjacent to the rear wheel,

including a pivtally mounted arm carrying a wheel at its free end adapted to engage the road b'ed on which the motor vehicle is standing, mechf anism for. causing pivotal movement of said arm, .said mechanism including a screw stem,

connections between said screw stems and an accessible point on the said fender, and means in-V eluded as a part of the operating ofl the said arm for engagingthe said-wheel of the motor vehicle as an incident to engagement of 40; the lack wheel with the road-bed.

2. HARRY ALLEN WHAR'I'ENBY. v LEWIS said lack `il c driving Il' 

